The near-far field relationship of vortices shed from transport aircraft

Stuff, R.

doi:10.2514/6.2001-2429

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…Several studies have considered the unforced development of a two-pair system, with counter-rotating vortices on each side of the airplane [4,[13][14][15][16]21]. When forced, this system can lead to enhanced breakup of the vortices as discussed in the previous section.…”

Section: Vortex Modification and Decaymentioning

confidence: 95%

Airplane trailing vortices and their control

Crouch

2005

Comptes Rendus. Physique

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Section: Vortex Modification and Decaymentioning

confidence: 95%

Airplane trailing vortices and their control

Crouch

2005

Comptes Rendus. Physique

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“…They used PIV in the towing tank to obtain quantitative information about the merger of flap and tip vortices. A similar approach was used by Stuff [11] and by Durston et al [12] to study the interaction of wing-tip vortices and tail vortices. The work of Crouch, Miller and Spalart [5] used a conventional wind-tunnel model to calibrate a towing-tank model in the wind tunnel-and then examined the evolution of the vortices in the towing tank from the tail of the airplane out to the far field using dye flow visualization.…”

Section: Introductionmentioning

confidence: 99%

Predicting the near-field evolution of airplane trailing vortices

Czech

Miller

Crouch

et al. 2005

Comptes Rendus. Physique

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The near-field (up to about 20 spans) development of trailing vortices is investigated experimentally and numerically. Computational Fluid Dynamics (CFD) results are based on the solution of quasi-3D Reynolds-averaged Navier-Stokes equations with a one-equation turbulence model. The inclusion of turbulence effects is found to be essential to capturing the correct near-field development. The CFD results are shown to be in very good agreement with experimental wake-survey results out to ten spans. Results show that wing loadings typical of commercial airplanes in a landing configuration can lead to multiple, or single vortex pairs, at distances of fifteen to twenty spans downstream.

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“…Another form of wake vortex instability has also been suggested as a candidate for aircraft wake attenuation 13,14 . The Rayleigh-Ludwieg instability is a centrifugal form of instability that occurs naturally for two unbent, parallel vortex lines of opposite rotation.…”

Section: Introductionmentioning

confidence: 99%

“…There have been a number of recent studies that have investigated the instabilities that persist in a four-vortex wake, both experimentally 13,14,[21][22][23][24][25][26] and numerically 9,10,18,20 . These studies have also suggested the growth of the wake instability is a function of the circulation strengths of each of the vortex pairs.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of the Stability of a Four-Vortex System

Nelson

Babie

2005

23rd AIAA Applied Aerodynamics Conference

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An experiment is currently being conducted at the University of Notre Dame to investigate the interactions, and ultimately the instabilities, that persist in a four-vortex wake. A wake consisting of four trailing vortices was created in Notre Dame's atmospheric boundary layer wind tunnel. The advantage of this tunnel is the long test section, which permits the observation of wake interactions at distances up to thirty wake-spans downstream of the point of generation. The wake was created by four high aspect ratio wing models such that the circulation strength and the spacing between each vortex in the wake may be controlled. The principle aim of this study is to experimentally determine the optimal configurations, based on circulation strength and spacing, that are consistent with the rapid amplification of certain wake vortex instability modes. The primary method for evaluating the experimental facility has been flow visualization. Helium bubbles were introduced into the core region of individual vortices to visualize these wake structures. This paper presents some early results from the visualization of the four-vortex wake. These results suggest that the use of helium bubbles is a suitable method for visualizing wake vortices for the full length of the test section.

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The near-far field relationship of vortices shed from transport aircraft

Cited by 9 publications

References 4 publications

Airplane trailing vortices and their control

Airplane trailing vortices and their control

Predicting the near-field evolution of airplane trailing vortices

An Experimental Study of the Stability of a Four-Vortex System

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